RSS data transience and the semantic web

What role can RSS 1.0 play in the semantic web considering the transience of
the data? Most data in RSS files today won't be there a month from now, as
the files get updated until today's items fall off the list. Can any
connections that would be useful for a web of information get built from
such data? 
 
It would seem sensible for sites to offer archives of their own RSS feeds,
but I don't know of any that do. (I tried searching for a few at
archive.org, and it never had more than 6 per year for any feed. A
surprising amount of the ones I tried couldn't be stored there because of a
robots.txt exclusion.) Is the application developer expected to archive all
data harvested from crawls? Does anyone know of any applications that are
doing this with RSS data? 
 
Or do we just consider RSS 1.0 to be an RDF application that's independent
of the semantic web? 
 
just curious,
 
Bob DuCharme   www.snee.com/bob <http://www.snee.com/bob>        <bob@  
snee.com> weblog on linking-related topics: 
http://www.oreillynet.com/pub/au/1191
<http://www.oreillynet.com/pub/au/1191>